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Posted to common-dev@hadoop.apache.org by "Ted Yu (JIRA)" <ji...@apache.org> on 2010/05/05 07:50:03 UTC

[jira] Created: (HADOOP-6749) Add mapred.tasktracker.tasks.maximum to limit the total number of map and reduce tasks

Add mapred.tasktracker.tasks.maximum to limit the total number of map and reduce tasks
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                 Key: HADOOP-6749
                 URL: https://issues.apache.org/jira/browse/HADOOP-6749
             Project: Hadoop Common
          Issue Type: New Feature
          Components: conf
    Affects Versions: 0.20.2
            Reporter: Ted Yu


We have mapred.tasktracker.map.tasks.maximum and mapred.tasktracker.reduce.tasks.maximum now.

It is desirable to have mapred.tasktracker.tasks.maximum which limits the total number of map and reduce tasks. Meaning its value may be lower than (mapred.tasktracker.map.tasks.maximum + mapred.tasktracker.reduce.tasks.maximum)
This would be useful in a cluster whose nodes are multi-core.

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[jira] Resolved: (HADOOP-6749) Add mapred.tasktracker.tasks.maximum to limit the total number of map and reduce tasks

Posted by "Vinod K V (JIRA)" <ji...@apache.org>.
     [ https://issues.apache.org/jira/browse/HADOOP-6749?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Vinod K V resolved HADOOP-6749.
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    Resolution: Duplicate

Hong is right, I am closing this as duplicate of MAPREDUCE-1379. Please read the discussions there and reopen this one if you don't agree.

> Add mapred.tasktracker.tasks.maximum to limit the total number of map and reduce tasks
> --------------------------------------------------------------------------------------
>
>                 Key: HADOOP-6749
>                 URL: https://issues.apache.org/jira/browse/HADOOP-6749
>             Project: Hadoop Common
>          Issue Type: New Feature
>          Components: conf
>    Affects Versions: 0.20.2
>            Reporter: Ted Yu
>
> We have mapred.tasktracker.map.tasks.maximum and mapred.tasktracker.reduce.tasks.maximum now.
> It is desirable to have mapred.tasktracker.tasks.maximum which limits the total number of map and reduce tasks. Meaning its value may be lower than (mapred.tasktracker.map.tasks.maximum + mapred.tasktracker.reduce.tasks.maximum)
> This would be useful in a cluster whose nodes are multi-core.

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